Auxiliary air valve for engines



May 25 1926.

- r. P. GRAY AUXILIARY AIR VALVE FOR mamas Filed April 1. 1925 Patented May 25,

UNITED STA -13 THOMAS P. GRAY, 0F GRIFFIN, GEORGIA.

AUXILIARY AIR vALvn non enemas,

Application filed April 1, 1925'. sm No. 19,959.-

This invention relates to auxiliary air intake devices adapted to be attached to the intake manifold'of an internal combustion engine.

I The primary object of this invention is the provision, in a manner as hereinafter set forth, of an auxiliary air intake device for the purpose above described, acting under the proper conditions to admit additional air to the intake manifold of an internal combustion engine, to bring about a better explosion in the cylinders of the engine and further increase the power thereof.

Another object of this invention is the provision, in a manner as hereinafter set forth, of an auxiliary air intake device having a valve element therein controlling the admission of air to the intake manifold without the use of springs or other force applying meansbut constructed to act simultaneously with the throttle valve to open the valve as the engine speed increases.

A final object of this invention is the provision, in a manner as hereinafter set forth, of an auxiliary air intake device of the character above described, which will have few working parts, of substantial construction and unlikely to be easily put out of order, a device consuming. little space, and further being readily and easily attached to the engine and inexpensive to manufacture.

The invention will be best understood from a consideration of the following detailed description taken in connection with the accompanying drawing forming a part of this specification, with the understanding however, that the invention is not confined to any strict conformity with the showing of the drawing, but may be changed and modified so long as such changes and modifications mark no material departure from the salient features of the invention as expressed in the appended claim.

In the drawing:

Figure 1 is a side elevation of the device embodying this invention the same being shown as applied to an intake manifold of an internal combustion engine. I

Figure 2 is a vertical longitudinal section through the device embodying this invention, and p Figure 3 is a transverse section of the device taken upon the line 3-3 of Figure 1.

Referring now to the drawing in detail wherein like numerals of reference indicate corresponding parts throughout the several views, the numeral 1 may indicate the intake manifold of an internal combustion engine, and for the application of the" def vice embodying this inventlon the manlfold is provided with an interiorly threaded bore 2 at any point thereon coi'ivenient for the application of the device.

The device embodiyng this invention comprises a cylindrical casting 3 havingan axial bore therethrough, the major portion of v which bore is of relatively wide diameter as indicated at 4 and a short portion thereof is of. relativelysmall diameter as indicated at 5. The point where the bore 4 merges with the'bore 5 is formed to providea substantially semi-circular seat 6 for the purpose hereinafter set forth. Through the wall of the casting above the seat 6 there is formed the interiorly threaded lateral bore 7.

' Into the bore 7 there is threaded one end of an elbow nipple 8 which in turn has connected thereto the pipe 9 the end of which is 1t(l1ireaded into the aperture 2 in the manifo. i

Fitted into the large portion 4 of the bore, is a solid plunger or piston 10, which rests upon solid ball valve 11 normally.

seated upon the seat 6 at the inner end of the portion 4. The upper end of the plunger 1 10 is bifurcated as shown, the furcat-ions or ears 12 of which aregprovided with. apertures 13 arranged in alignment as shown.

Secured to the casting 3 is a clamp member comprising a pair of semi-circular arms 1i each terminating at its free end in an car 15, which ears are inspaced relation and are provided with apertures 16 through which a clampingbolt 17 passes. The other ends of the arms 14 merge into a right angled element 18, one arm of which extends upwardly as shown and is provided adjacent, its upper end with means to re ceive a pivot pin 19 therethrough.

Pivotally mounted upon the pin 19 is a bell crank member indicated generally by the numeral 20,'the arm 21 of which is pivoted adjacent its inner end upon the pin. 19 and the outer end thereof is bifurcated to provide the furcations 22 and this bifurcated end extends between the furca-tions 12 of the plunger 10 and there is passed through the apertures 13 the pivot pin 23 which also seats between the furcatioiis 22 of the arm 21. The free end of the other rod 26 is engaged. The rod 26 is adapted to be connected to the throttle valve lever of a carburetor (not shown).

From the foregoing description it Will be seen that, when the device is attached to an engine and the rod 26 connected to the throttle valve arm of the carburetor, upon opening the valve of the carburetor to increase the speed of the engine the rod 26 will be drawn forwardly thereby pulling upon the arm 24 and raising the plunger 10 from the ball 11. The suction created in the intake manifold will then lift the ball from its seat and additional air will be admitted with the gasoline supply.

Having thus described my invention what I claim is:

An auxiliary air intake device, comprising a cylindrical casting having an axial bore, the major portion of said bore being of relatively wide diameter, and the remaining portion of relatively small diameter to provide at their merging point a valve seat, a ball valve in the larger portion of the bore to engage the seat, a piston of a diameter corresponding to that of the larger portion of the bore and slidable therein, the upper part of the piston being furcated, a substantially L-shaped arm having a forked end lying in the fureation of the piston, a cross pin engaged in the furcated part of the piston and straddled by the forked end of the arm, a clamp'embi'acing the casting and having a hanger pivotally supporting the arm, and a pipe leading from the bore in the casting above the seat, and adapted for communication with the intake of an internal combustion engine.

In testimony whereof, I al'lix my signature hereto.

THOMAS P. GRAY. 

